Window movement limiting device



Sept. 22, 1959 A. T. HAGERTY 2,904,855 WINDOW MOVEMENT LIMITING DEVICEFiled Oct. 26', 1956 IL 11 Y I" /i F5 L j zz 54 k I '1 :5 1 T -r2 g 50 3J7 "17.? 75

42' Alf J INVENTOR.

:2" 012M BY United States Patent WINDOW MOVENIENT LIMITING DEVICE AndrewT. Hagerty, Elkhart, Ind., assignor to The Adlake Company, Elkhart,Ind., a corporation of Illinois Application October 26, 1956, Serial No.618,523

9 Claims. (Cl. 20- 52) This invention relates to window constructionsand is more particularly concerned with improvements in a device whichis employed to limit the opening movernent of a sliding sash relative tothe supporting frame in which it is mounted.

In connection with the installation of double hung windows, it isfrequently desirable to provide a device for limiting the openingmovement-of the bottom sash. Such devices generally comprise a fixedstop member on the frame and a cooperating stop member on the sash, thestop members being. arranged to normally prevent the sash from beingopened beyond a predetermined distance, usually less than'th'e distancerequired to permit a person ofnormalsize to use the window as anentrance or exit. Devices ofth'i's general character, which haveheretofore'been provided, have not been entirely satisfactory, and it isageneral'object of the present invention to provide'an' improved 'sash'movement limiting device which comprises cooperating abutment stopmembers adapted to be affixed to the side members of the supportingframe and to the sliding sash, respectively, with the stop mem beron'the sash being mounted for ready and easy key operatedadjustment'intoand out of a position where it projectsfrom the-frame' of the sashand is carried by opening movement 'of' the same into engagement withthe stop member which is fixed on the supporting frame, so that thedevicemay be rendered inoperative only by a person having a key as whenthe outside of the window is to be cleaned or the like. I

It is a more'specific object of the'inventionto' provide an improveddevice for limiting the opening movement of a sashof'the'type which ismounted'insliding relation in awindow' frame, whichdevice comprises astop block mounted in a fixed'position on the side'member of thesupporting frame where it normally clears the sash andacooperating'stopbarmounted in sliding relation on the sash' and-havingkey operated actuating mechanism associated therewith for moving thesame into a position where it will engage with the stop block when thesash is moved-a predetermined distance froma closed position toward anopen position.

It isa further object of the invention to provide a movement limitingdevice for a window sash which 'is mounted in sliding relation -'in achannel-like supporting frame which device comprises an abutment blockfixed on a side member of the frame in which the sash ismounted andnormally projecting into a recess in 'a side member of the sash framewhen the latter is moved to an open position, and a latch bar mounted insliding relation in a housing which is securedon' the top rail of thesash and which is provided with a key operated rotatable cam member forpositioning the bar to project the end thereof laterally of the sashand-into the recess in the side member of the same a sufficient'distanceto engage in abutting relation with theabutment-block when the sash israiseda predetermined distance.-

These and other objects and advantages of the inventionrwill be apparentfrom a consideration of the. device which is shown by way ofillustration in the accompanyingdrawings, wherein:

Pig. 1 is an elevation of the inside of a double hung windowconstruction having a movement limiting device for. the lower or innersash which incorporates the principal'; features of the inventionj Fig.2 is a vertical section taken on the line 2-2 of Fig. l, on an enlargedscale and with portions broken away;

Fig. 3 is a horizontal section, on a larger scale, taken on the line3-3-of Fig. 1, and with portions broken away;

Fig. 4 is a cross section taken on' the line 4 -4 of Fig. 3;

Fig. 5 is a cross section taken on the line 5-5 of Fig. 4; and

Pig. 6 is a fragmentary perspective view, to an enlarged scale,showing-the fixed stop block which is secured on the jamb of thesupporting frame.

Referring to the drawings,'a'double hung window is illustrated whichcomprises an upper outer sash 10 and a lower inner sash 11 which aremounted in a surrounding frame 12, the latter being secured inan'opening in a vertical wall. The supporting frame 12 and the sash and11 comprise frame members which are formed preferably of sections ofextruded metal, such as aluminum, stainless steel or the like.

T be supporting frame 12 comprises oppositely disposed upright side orjamb members 13 which are formed with side-by-side inner and outervertical guide channels 14 and 15anda vertical'parting strip formation16 which separates the same.

The upper sash 16 is mounted in the outer guide channel 15; while thelower sash 11 is mounted in sliding relation in the inner guide channel14.- Weatherstripping 18 is provided on the side frame members 17 of thelower sashlll The top cross rail or meeting rail 19 of the sash 11has'an outwardly extending flange section providing a downwardly openingchannel or recess 21 for cooperation with an upstanding flange 21 on theinner side ofthe meeting rail 22 of the upper sash 10 to provide aweather seal between the two sash 10 and 11 when they are closed as inFig. 2. The channel 20 is preferably provided with Weatherstripping 23.

The upper sash 10 is fixed in position in the frame 12 or it may bemounted for sliding movement therein and provided with inside 1ockingdevices (not shown) to prevent itfrom being lowered or opened from theoutside. The lower sliding sash 11 is provided, preferably at both sidesthereofjwith a movement limiting device 25 which may be adjusted toprevent opening movement of the sash 11 beyond a predetermined distancebut which may be rendered inoperative, when desired, to permit fullopening movement of the sash).

Thestop device 25 comprises an elongate stop block 26"of'generally'rectangular cross section which issecured by screws 27 to theparting strip formation 16 ofthesi'de or jamb member 13 of thesupporting frame 12 at a predetermined distance above the top -crossrails 19 and'ZZwhen the sash are in the closed position. The stop block261s positionedso that it is aligned with a recess '28flfornred bynotching the outer corner of the top rail 19 of't'ne sash'11 andnormally doe-s not interfere with vertical or opening moveme'nt'of thesash 11.

A slide plate forming a movable stop bar 30 is mounted on thetop crossrail 19 of the inner sash 11 in a hOllS'? ing'31which is secured to therail 19 by screws 32. The housing-31' is formed on the inside thereofto'proVide a generally L-shaped recess 33 which is adapted to recei'vethe'slide barStl'. The slide bar 30 has a slide portion 34 of generallyrectangular shape and cross section with longitudinally spaced laterallyextending arms 35 adjacent the inner end thereof which are spaced adistance apart sufficientto straddle a rotatable b-arrel-likecam m'ember36. The cam member 36 has a bore 37 with an axially and radiallyextending slot 38 and with trunnion forming hub formations 39 and 40 atopposite ends thereof. The hub formation 39 is rotatably received in abore 41 in the upper Wall 42 of the housing 31 and the opposite hubformation 4%) is received in an aperture or bore 43 in a bottom coverplate 44 which is secured on the bottom of the housing 31 by screws 45.The bores 41 and 43 are, of course, aligned to receive the hubformations 39 and 40. The housing 31 has shoulder formations 46 in whichthe screws 45 are received and the space between the same is suflicientto accommodate the arms 35 and the cam member 36 which are positionedfor movement therein. The peripheral surface of the cam member 36 iseccentric relative to the axis of rotation of the member so thatrotation of the cam member 36 in the space between the arms 35 on thelatch or stop bar 30 slides the bar 30 in one direction or the other.

A key 50 is provided for operating the cam member 36 which has a stem 51with a radially projecting plate-like tongue 52 at one end which isadapted to be received in the slot 38 in the cam member 36 when the stem51 is positioned in the bore 37. A handle forming cross piece 53 isprovided at the other end of the stem 51 of the key 50. The bore 41 inthe wall 42 of the housing is only slightly larger in diameter than thestem 51 of the key 50 and is provided with a radially outwardlyextending slot 54 corresponding to the slot 38 in the cam member 36 sothat when the key 50 is inserted in the bore 37 of the cam member 36 andturned, it cannot be removed until it is rotated to align the tongue 52with the slot 54.

In using the mechanism described, the movable stop members are assembledwith the bottom sash 11 at opposite ends of the top rail 19, eachhousing 31 being secured on the end of the top surface of the rail 19 sothat when the slide bar 30 is in extended or operative position, the endthereof will project across the recess 28 in the rail and toward theparting strip formation 16. The fixed stop blocks 26 are permanentlysecured on oppositely disposed portions of the inner surfaces of theparting strip formations 16, at the desired height so that each oneprojects inwardly into the path of the projected end of a slide bar 30when the sash 11 is raised a predetermined distance, thereby providing alimit to the upward movement of the same. The slide bars 30 may beretracted by rotation of the key 50 to enable the sash to be raisedwithout interference by the fixed stop blocks 26, as, for example, whenit is required to clean the outside of the sash. The key 50 cannot beremoved while the slide bar 30 is retracted but it may be removed onlywhen the slide bar 30 is in extended or operative position.

The mechanism is normally in operative position with the key removed andthe sash cannot be fully raised either from the inside or the outside.With this arrangement the window washer or other person having a key foroperating the mechanism is not likely to leave the sash in the openposition beyond the limit of the stop blocks 26 but will be reminded torestore the sash to its normal condition before removing the key.

While specific materials and particular details of construction arereferred to in describing the illustrated form of the Window movementlimiting device, it will be understood that other materials and otherdetails of construction may be resorted to within the spirit of theinvention.

1 claim:

1. A movement limiting device for a Window sash which is mounted insliding relation in a supporting frame, said sash having side membersand connecting top and bottom cross rails, said supporting frame havingside members with opposed side guideway forming recesses which areadapted to receive the marginal portions of the sash side members insliding relation therein, the top rail of said sash having a greaterWidth than the side members and said top rail being notched at the outercorners thereof, said device comprising a stop block mounted on the saidsupporting frame adjacent a guideway forming recess and projectingtoward the interior of said supporting frame, said stop block beingpositioned in spaced relation above the top rail of the sash andprojecting into the notched corner of the top rail of the sash when thesash is raised, a latch bar, a housing in which said latch bar ismounted for sliding movement therein, means securing said housing on thetop rail of the sash in position for the end of the latch bar to projectover the notched corner thereof when the bar is moved to an outwardlyextended position, and a manually operable key member engageable withthe latch bar for moving it to and from extended position where it isengaged by the stop block when the sash is raised a predeterminedamount.

2. A movement limiting device for a window sash which is mounted insliding relation in a supporting Window frame, said sash having sidemembers and connecting top and bottom cross rails, said supporting framehaving opposed side members with guideway forming recesses adapted toreceive the marginal portions of the sash side members in slidingrelation therein, the top rail of the sash having a width greater thanthe width of the side frame members and said top rail being notched atan outer corner thereof, said device comprising a stop block mounted onthe said supporting frame adjacent a guideway forming recess andprojecting toward the interior of the frame, said stop block beingpositioned in spaced relation above said sash and projecting into thenotched corner of the top rail of the sash when the sash is raised, alatch bar, a housing having an internal guideway in which said latch baris mounted for sliding movement so that the end thereof may be projectedbeyond the housing, means securing said housing on the top rail of thesash in position for the end of the latch bar to extend over the notchedcorner thereof when the latch bar is moved to an extended position, anda cam member in the housing which is engageable with the latch bar formoving it to and from extended position where it is engaged by the stopblock when the sash is raised a predetermined amount.

3. A movement limiting device for a window sash which is mounted insliding relation in a supporting frame, said sash having side membersand a connecting top cross rail, said supporting frame having sidemembers with opposed side guideway forming recesses which are adapted toreceive the marginal portions of the sash side members in slidingrelation therein, the top rail of said sash being notched at an outercorner thereof, a stop block mounted on the said supporting frameadjacent a guideway forming recess and projecting toward the interior ofsaid supporting frame, said stop block being positioned in spacedrelation above the top cross rail of the sash and projecting into thenotched corner of the top rail of the sash when the sash is raised, anelongate latch bar, a housing in which said latch bar is mounted forsliding movement therein, means securing said housing on the top rail ofthe sash in position for the end of the latch bar to project over thenotched corner thereof when the bar is moved to an outwardly extendedposition, said latch bar having a side recess at its inner end, acylindrical cam member rotatably mounted in said housing and received insaid side recess, an axial and radial slot in said cylindrical cammember, a key member engageable within said cam member, said key memberhaving a tongue engageable in said slot for rotating said cam member tomove said latch bar to and from extended position where it is engaged bythe stop block when the sash is raised a predetermined amount, and saidhousing having a key-hole slot whereby to permit insertion of the keywhen the slots are aligned and to permit removal of the key only whenthe cam member is rotated to move said latch bar to its extendedposition.

i.v movement. limiting device for awindow structure wherein a sash ismounted in'vertical-sliding relation in a supporting window frame, saidsupporting frame comprising opposedside members having guideway formingrecesses adapted to receive the marginal portions of the sash sidemembers in sliding relation therein, said sash having-side members andconnecting top and bottom'cross rails with the top rail'ofthe-sash-having a greater width than the side members thereof andsaidtop 'rail being notched at' an outercorner thereof adjacent the end ofaside member, said device comprising a stop block adapted to be mountedin fixed relation on-thesaid supporting frame along the side of aguideway forming recess and projecting inwardly of the supporting framein spaced relation above the top rail of the sash when the sash is inits lowermost position, said stop block projecting in non-interferingrelation into the notched corner of the top rail of the sash when thesash is raised, an elongate latch bar having laterally extendinglongitudinally spaced arms, a housing having an internal recess in whichthe arm carrying portion of said latch bar is mounted for slidingmovement to shift the latch bar into and out of an extended position,means for securing said housing on the top rail of the sash in positionfor the outer end of the latch bar to extend over the notched cornerthereof when the bar is moved to the extended position, a cylindricalcam member rotatably mounted in the recess in the housing and betweenthe arms on said latch bar, and a key member engageable with the cam formoving the latch bar to and from extended position.

5. A movement limiting device for a window sash which is mounted in thelower portion of a supporting frame, said device comprising elongatestop blocks mounted in oppositely disposed fixed position on saidsupporting frame and projecting inwardly thereof, said sash having a toprail provided with recesses at its opposite ends which normallyaccommodate the stop blocks to permit free vertical movement of the sashin said supporting frame, and a pair of movable stop bar devices mountedon the ends of the top rail of said sash for cooperation with said stopblocks, each of said stop bar devices comprising a housing mounted onsaid top rail, a sliding bar in said housing with one end thereofmounted so that it may be extended to project across said end recesstoward said supporting frame, a cam member rotatably mounted in saidhousing and engaging said sliding bar, and a key member adapted to beengaged with said cam member to rotate the same and position the end ofthe sliding bar across said end recess for engagement with the fixedstop block on the supporting frame thereby to limit the opening movementof the sash.

6. Means for limiting the movement of a window sash which is mounted insliding relation in a supporting window frame, said sash having sidemembers and connecting top and bottom cross rails, said supporting framecomprising opposed side members having guideway forming recesses adaptedto receive the marginal portions of the sash side members in slidingrelation therein, the top rail of the sash having a greater width thanthe side members thereof and said top rail being recessed at the outercorners thereof adjacent the ends of the side members, said movementlimiting means comprising stop blocks adapted to be mounted in fixedrelation on said supporting frame adjacent the guideway forming recessesand projecting inwardly of the supporting frame in spaced relation abovethe top cross rail of the sash, said stop blocks being positioned toproject into the notched corners of the top rail when the sash israised, cooperating movable stop bar devices adapted to be mounted ateach end of the top rail, each of said movable stop bar devicescomprising an elongate bar member having laterally extendinglongitudinally spaced arms, a housing having an internal recess in whichthe arm carrying portion of said bar member is mounted for slidingmovement to and from anextended position, means for securing saidhousing on the top rail of the sash in position for the outer end'of thebar member to extend over the notched corner thereof when the bar memberis moved to the extendedposition, a cylindrical cam member rotatablymounted in the recess in the housing and between the arms on said barmember, and a key engageable with the cam for moving the bar member toand from extended position.

7. Means for limitingthe movement of a window sash which is mounted insliding relation in a supporting frame, said sash having side membersand a connecting top cross rail, said supporting frame having sidemembers with opposed side guideway forming recesses which are adapted toreceive the marginal portions of the sash side members in slidingrelation therein and the top rail of said sash being notched .at anouter corner thereof, said movement limiting means comprising a stopblock adapted to be mounted on the said supporting frame above the topcross rail of the sash and adjacent a guideway forming recess and toextend toward the interior of said supporting frame, said step blockbeing positioned to project into the notched corner of the top rail ofthe sash when the sash is raised, an elongated latch bar, a housing inwhich said latch bar is mounted for sliding movement therein, means forsecuring said housing on the top rail of the sash in position for theend of the latch bar to project over the notched corner thereof when thebar is moved to an outwardly extending position, said latch bar having aside recess at its inner end, a cylindrical cam member rotatably mountedin said housing and received in said side recess, an axial and radialslot in said cylindrical cam member, and a key member engageable withinsaid cam member, said key member having a tongue engageable in said slotfor rotating said cam member to move said latch bar to and from extendedposition Where it is adapted to be engaged by the stop block when thesash is raised a predetermined amount.

8. A movement limiting device for a window sash which is mounted invertical sliding relation in a supporting frame, said sash lhaving sidemembers and connecting top and bottom cross rails, said supporting framehaving side members with opposed side guideway forming recesses whichface inwardly of the frame and which are adapted to receive the marginalportions of the sash side members in vertical sliding relation therein,the top rail of said sash having a greater width than said guidewayforming recesses and said top rail being notched at an outer cornerthereof, said device comprising a stop block mounted on the supportingframe adjacent the guideway forming recess and projecting inwardly ofsaid supporting frame, said stop block being positioned in verticallyspaced relation above the top rail of the sash when the sash is closedand projecting into the notched corner of the top rail of the sash whenthe sash is raised, a latch bar, a housing in which said latch bar ismounted for sliding movement therein, means securing said housing on thesash in position for the end of the latch bar to project over thenotched corner of the top rail when the bar is moved to an outwardlyextended position, and a key member for moving the latch bar into andout of extended position so that the latch bar, when in extendedposition, will be engaged by the stop block upon raising the sash apredetermined amount.

9. A movement limiting device for a window structure which ischaracterized by an exterior frame having vertical recesses forming sideguideways in oppositely disposed relation and a sash mounted in saidexterior frame with the side edges thereof received in sliding relationin said guideways, said device comprising a stop block mounted on saidframe in fixed position adjacent a side guideway and in verticallyspaced relation above the top of the sliding sash, said sash having atop rail member which overhangs the outerside of the sash and which isnotched at the outer corner, the stop block being mounted 7 to projectinwardly of the surface of the side member of the frame and the sashbeing mounted in the flame so that the notched corner of the top railmember normally clears the stop block when the sash is raised andpermits free sliding movement of the sash past the stop block, a stopbar, a housing in which the stop bar is mounted in sliding relation,means for securing said housing on the top rail of said sash, with saidstop bar positioned so that it may be extended toward the supportingframe to project the end thereof across the notched corner of the toprail, whereby when said stop bar is extended and said sash is movedupwardly the end of said stop bar will engage with said stop block tolimit the upward movement of the sash. v

References Cited in the file of this patent v UNITED STATES PATENTS SahrNov. 24, 1885 Hosea Dec. 1"], 1889 Bruns Sept. 27, 1892 Smith Nov. 16,1897 Bowles Jan. 19, 1926 Nardulli Sept. 8, 1953

